North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
7
since 1997
4,732
categories
11

In force now · 1

  1. HYDROLANT 1496/26 · Surveys2026-08-03
    Survey operations are underway in the North Sea near Norway by the vessel Ramform Hyperion towing ten 2740-meter cables, requesting a three-mile berth.

Longest in force

  1. HYDROLANT 1496/26 · Surveys2026-08-03
    Survey operations are underway in the North Sea near Norway by the vessel Ramform Hyperion towing ten 2740-meter cables, requesting a three-mile berth.

By year

97
98
99
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
26

By month (all years)

J
F
M
A
M
J
J
A
S
O
N
D

By category · since 1997

Nav aids2,50353%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,731 cancelled

  1. HYDROLANT 1512/03 · Wrecks2003-08-09 → 2003-08-10
    Dangerous wreck in 52-33.46N 002-32.54E
  2. HYDROLANT 1510/03 · Nav aids2003-08-09 → 2003-08-10
    Newarp lightfloat 52-48N 001-56E fog signal unreliable
  3. HYDROLANT 1500/03 · Nav aids2003-08-09 → 2003-08-09
    Auskerry light 59-01.6N 002-34.2W unreliable
  4. HYDROLANT 1494/03 · Nav aids2003-08-08 → 2003-08-09
    Bell rock light 56-26.1N 002-23.2W unreliable
  5. HYDROLANT 1493/03 · Nav aids2003-08-08 → 2003-08-08
    Fidra island light 56-04.1N 002-47.0W unreliable
  6. HYDROLANT 1492/03 · Other2003-08-07 → 2003-08-08
    Odas buoy K16 adrift in 57-41.1N 000-56.7E at 071500Z aug
  7. HYDROLANT 1478/03 · Other2003-08-05 → 2003-08-05
    Pentland skerries light 58-41N 002-55W at reduced intensity
  8. HYDROLANT 1405/03 · Other2003-07-21 → 2003-07-22
    Underwater ordnance detonations in progress until further notice in 60-40.1N 001-25.4E
  9. HYDROLANT 1364/03 · Nav aids2003-07-16 → 2003-07-16
    RACON at orford ness light 52-05N 001-35E off air 161100Z to 161300Z jul
  10. HYDROLANT 1325/03 · Nav aids2003-07-09 → 2003-07-10
    Dgps station at north foreland light 51-22.5N 001-26.8E off air 0800Z to 1700Z daily 09 and 10 jul
  11. HYDROLANT 1315/03 · Other2003-07-07 → 2003-07-10
    Pipelaying operations in progress until further notice by M/V normand mermaid within one mile of 58-11.5N…
  12. HYDROLANT 1300/03 · Cable ops2003-07-05 → 2003-07-16
    Underwater operations in progress until further notice by cableship ile de sein in area bound by 51-31.4N…
  13. HYDROLANT 1298/03 · Other2003-07-04 → 2003-09-13
    Platform K7-FB under construction in 53-37.8N 003-04.1E
  14. HYDROLANT 1294/03 · Nav aids2003-07-04 → 2003-07-10
    Humber lightfloat 53-39.1N 000-20.1E unlit
  15. HYDROLANT 1291/03 · Surveys2003-07-03 → 2004-04-16
    Salvage operations in progress until further notice vicinity 51-22.0N 002-12.9E
  16. HYDROLANT 1284/03 · Other2003-07-02 → 2003-07-05
    Pipelaying operations in progress until further notice by M/V mormand mermaid vicinity of trackline between…
  17. HYDROLANT 1238/03 · Other2003-06-26 → 2003-08-26
    Navigation prohibited until further notice within 500 meters of 51-22.0N 002-12.9E
  18. HYDROLANT 1228/03 · Nav aids2003-06-25 → 2003-06-26
    Dgps station at flamborough head light 54-07N 000-05W inoperative 0730Z to 1700Z daily 25 and 26 jun
  19. HYDROLANT 1221/03 · Surveys2003-06-24 → 2003-06-25
    Underwater operations in progress until further notice by M/V seaway petrel with submersible vicinity of…
  20. HYDROLANT 1215/03 · Cable ops2003-06-22 → 2003-07-01
    Cable operations in progress until further notice by cableship maersk defender vicinity 52-43.1N 002-09.4E

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.